Before the most recent update the endermite attracted the endermen. This, I had used to create an ender xp farm. As of the update, the endermen are no longer attracted to the endermite. Not sure if this is a bug or a change that Mojang wanted to make so thought that it might be useful to just say since it's not on any change list which I have seen thus far.
Also noticed this while checking out the new endermite model. Tested in Creative and Spectator modes, in the overworld and in the End. Endermen, both from spawn eggs and natural spawn, ignored spawn egg endermites. Unsure about naturally spawned ones.